positive regulation of spindle attachment to meiosis I kinetochore / positive regulation of meiotic DNA double-strand break formation involved in reciprocal meiotic recombination / positive regulation of DNA replication initiation / positive regulation of kinetochore assembly / positive regulation of meiotic DNA double-strand break formation / negative regulation of exit from mitosis / Dbf4-dependent protein kinase complex / positive regulation of meiosis I / regulation of cell cycle phase transition / positive regulation of nuclear cell cycle DNA replication ...positive regulation of spindle attachment to meiosis I kinetochore / positive regulation of meiotic DNA double-strand break formation involved in reciprocal meiotic recombination / positive regulation of DNA replication initiation / positive regulation of kinetochore assembly / positive regulation of meiotic DNA double-strand break formation / negative regulation of exit from mitosis / Dbf4-dependent protein kinase complex / positive regulation of meiosis I / regulation of cell cycle phase transition / positive regulation of nuclear cell cycle DNA replication / mitotic DNA damage checkpoint signaling / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / mitotic DNA replication preinitiation complex assembly / premeiotic DNA replication / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / mitotic DNA replication / Activation of the pre-replicative complex / CMG complex / single-stranded 3'-5' DNA helicase activity / nuclear pre-replicative complex / MCM complex / Activation of ATR in response to replication stress / DNA replication preinitiation complex / protein-containing complex localization / replication fork protection complex / mitotic DNA replication checkpoint signaling / mitotic DNA replication initiation / double-strand break repair via break-induced replication / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / single-stranded DNA helicase activity / DNA strand elongation involved in DNA replication / DNA unwinding involved in DNA replication / nuclear replication fork / 3'-5' DNA helicase activity / DNA replication origin binding / chromosome, centromeric region / subtelomeric heterochromatin formation / DNA replication initiation / heterochromatin formation / protein serine/threonine kinase activator activity / helicase activity / chromosome segregation / single-stranded DNA binding / DNA helicase / chromosome, telomeric region / non-specific serine/threonine protein kinase / phosphorylation / positive regulation of protein phosphorylation / cell division / protein serine kinase activity / protein serine/threonine kinase activity / centrosome / DNA damage response / chromatin binding / chromatin / signal transduction / ATP hydrolysis activity / zinc ion binding / nucleoplasm / ATP binding / identical protein binding / nucleus / metal ion binding / cytoplasm Similarity search - Function
Regulatory subunit Dfp1/Him1, central region / Dfp1/Him1, central region / Zinc finger, DBF-type / DBF-type zinc finger superfamily / DBF zinc finger / Zinc finger DBF4-type profile. / Zinc finger in DBF-like proteins / MCM4, winged helix domain / DNA replication licensing factor Mcm5 / DNA replication licensing factor Mcm3 ...Regulatory subunit Dfp1/Him1, central region / Dfp1/Him1, central region / Zinc finger, DBF-type / DBF-type zinc finger superfamily / DBF zinc finger / Zinc finger DBF4-type profile. / Zinc finger in DBF-like proteins / MCM4, winged helix domain / DNA replication licensing factor Mcm5 / DNA replication licensing factor Mcm3 / Mini-chromosome maintenance complex protein 4 / DNA replication licensing factor Mcm6 / DNA replication licensing factor Mcm7 / Mcm6, C-terminal winged-helix domain / MCM6 C-terminal winged-helix domain / DNA replication licensing factor Mcm2 / Mini-chromosome maintenance protein 2 / Mini-chromosome maintenance, conserved site / MCM family signature. / MCM N-terminal domain / MCM N-terminal domain / MCM OB domain / MCM OB domain / Mini-chromosome maintenance protein / MCM, AAA-lid domain / MCM P-loop domain / MCM AAA-lid domain / MCM family domain profile. / minichromosome maintenance proteins / MCM domain / BRCT domain superfamily / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Winged helix-like DNA-binding domain superfamily / Protein kinase domain / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Serine/Threonine protein kinases, catalytic domain / Nucleic acid-binding, OB-fold / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily / P-loop containing nucleoside triphosphate hydrolase Similarity search - Domain/homology
Cell division control protein 7 / DNA replication licensing factor MCM3 / DNA replication licensing factor MCM2 / Minichromosome maintenance protein 5 / DNA replication licensing factor MCM4 / DDK kinase regulatory subunit DBF4 / DNA replication licensing factor MCM7 / DNA replication licensing factor MCM6 Similarity search - Component
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/T005378/1
United Kingdom
Wellcome Trust
107903/Z/15/Z
United Kingdom
Medical Research Council (MRC, United Kingdom)
A652-5PY40
United Kingdom
Wellcome Trust
206175/Z/17/Z
United Kingdom
Citation
Journal: Nat Commun / Year: 2022 Title: The structural basis of Cdc7-Dbf4 kinase dependent targeting and phosphorylation of the MCM2-7 double hexamer. Authors: Almutasem Saleh / Yasunori Noguchi / Ricardo Aramayo / Marina E Ivanova / Kathryn M Stevens / Alex Montoya / S Sunidhi / Nicolas Lopez Carranza / Marcin J Skwark / Christian Speck / Abstract: The controlled assembly of replication forks is critical for genome stability. The Dbf4-dependent Cdc7 kinase (DDK) initiates replisome assembly by phosphorylating the MCM2-7 replicative helicase at ...The controlled assembly of replication forks is critical for genome stability. The Dbf4-dependent Cdc7 kinase (DDK) initiates replisome assembly by phosphorylating the MCM2-7 replicative helicase at the N-terminal tails of Mcm2, Mcm4 and Mcm6. At present, it remains poorly understood how DDK docks onto the helicase and how the kinase targets distal Mcm subunits for phosphorylation. Using cryo-electron microscopy and biochemical analysis we discovered that an interaction between the HBRCT domain of Dbf4 with Mcm2 serves as an anchoring point, which supports binding of DDK across the MCM2-7 double-hexamer interface and phosphorylation of Mcm4 on the opposite hexamer. Moreover, a rotation of DDK along its anchoring point allows phosphorylation of Mcm2 and Mcm6. In summary, our work provides fundamental insights into DDK structure, control and selective activation of the MCM2-7 helicase during DNA replication. Importantly, these insights can be exploited for development of novel DDK inhibitors.
Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Support film - Film thickness: 2 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 25 sec. / Pretreatment - Atmosphere: AIR / Details: 15 mA
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: blot for 1.5 seconds and blot force +2.
-
Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Number real images: 3416 / Average electron dose: 50.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron optics
Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 75000
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